Authors:
Giada Sciarretta
1
;
Alessandro Armando
2
;
Roberto Carbone
3
and
Silvio Ranise
3
Affiliations:
1
FBK-Irst and University of Trento, Italy
;
2
FBK-Irst and University of Genova, Italy
;
3
FBK-Irst, Italy
Keyword(s):
Single Sign-On, Digital Identity, Security of Mobile Devices, OAuth 2.0.
Related
Ontology
Subjects/Areas/Topics:
Data and Application Security and Privacy
;
Identity Management
;
Information and Systems Security
;
Security and Privacy in Mobile Systems
;
Security Protocols
Abstract:
While there exist many secure authentication and authorization solutions for web applications, their adaptation in the mobile context is a new and open challenge. In this paper, we argue that the lack of a proper reference model for Single Sign-On (SSO) for mobile native applications drives many social network vendors (acting as Identity Providers) to develop their own mobile solution. However, as the implementation details are not well documented, it is difficult to establish the proper security level of these solutions. We thus provide a rational reconstruction of the Facebook SSO flow, including a comparison with the OAuth 2.0 standard and a security analysis obtained testing the Facebook SSO reconstruction against a set of identified SSO attacks. Based on this analysis, we have modified and generalized the Facebook solution proposing a native SSO solution capable of solving the identified vulnerabilities and accommodating any Identity Provider.